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CN111951833B - Voice test method, device, electronic equipment and storage medium - Google Patents

Voice test method, device, electronic equipment and storage medium Download PDF

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Publication number
CN111951833B
CN111951833B CN202010772715.4A CN202010772715A CN111951833B CN 111951833 B CN111951833 B CN 111951833B CN 202010772715 A CN202010772715 A CN 202010772715A CN 111951833 B CN111951833 B CN 111951833B
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audio
sound source
microphone
detected
voice
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CN111951833A (en
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吴国栋
邢朝路
林敏�
王晓
姚庭龙
杨辉
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iFlytek Co Ltd
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iFlytek Co Ltd
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78Detection of presence or absence of voice signals
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/48Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
    • G10L25/51Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use for comparison or discrimination

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The embodiment of the invention provides a voice test method, a voice test device, electronic equipment and a storage medium, wherein the method comprises the following steps: generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected; and performing voice test based on the analog microphone output signal. According to the voice test method, the voice test device, the electronic equipment and the storage medium, the analog microphone output signal is generated based on the adjustable sound source setting information to be tested and the sound source position information to be tested, and the voice test is performed based on the analog microphone output signal, so that the comprehensiveness of the voice test is improved, meanwhile, adverse effects of various factors such as the microphone installation position, the actual wiring state, the operation difference of testers, the environmental noise of a production workshop and the like are shielded, the accuracy of the voice test is improved, and the retest times are reduced.

Description

Voice test method, device, electronic equipment and storage medium
Technical Field
The present invention relates to the field of signal processing technologies, and in particular, to a method and apparatus for testing speech, an electronic device, and a storage medium.
Background
Along with the development of the intelligent control field, the voice equipment mainly used for voice recognition and sound source positioning, such as a vehicle-mounted information entertainment navigation system, plays an important role in realizing intelligent control and improving man-machine interaction experience. In order to ensure the normal operation of the voice equipment, when the manufacturer produces the voice equipment input by the integrated microphone, the manufacturer needs to perform voice test on the voice equipment based on the voice signals collected and output by the microphone.
In the current voice test method, test audio is output through a tester or an external power amplification system, an external microphone of voice equipment collects the test audio signal and outputs a corresponding analog signal, and finally analog-to-digital conversion is carried out on the analog signal so as to carry out voice test on the voice equipment. However, in the whole test link, the accuracy of the voice test is affected by factors such as the installation position of the microphone, the actual wiring state, the station of the tester, the noise of the production environment, and the like, resulting in poor accuracy of the voice test.
Disclosure of Invention
The embodiment of the invention provides a voice test method, a voice test device, electronic equipment and a storage medium, which are used for solving the defect of insufficient voice test accuracy in the prior art.
The embodiment of the invention provides a voice test method, which comprises the following steps:
generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected;
And performing voice test based on the analog microphone output signal.
According to an embodiment of the present invention, the method for generating an output signal of an analog microphone based on setting information of a sound source to be detected and position information of the sound source to be detected specifically includes:
determining the relative positions of the sound source to be detected and a plurality of microphones based on the position information of the sound source to be detected;
Attenuating standard audio corresponding to the setting information of the sound source to be detected based on an audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone to obtain the audio to be detected of any microphone;
And performing signal processing on the audio to be detected of any microphone to obtain an analog microphone output signal of any microphone.
According to an embodiment of the present invention, the audio attenuation coefficient corresponding to the relative position between the sound source to be tested and any microphone is determined based on the following steps:
And selecting the audio intensity in the setting information of the sound source to be detected and the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone from the audio attenuation coefficients corresponding to different audio intensities and different relative positions which are predetermined.
According to one embodiment of the present invention, the audio attenuation coefficients corresponding to different audio intensities and different relative positions are determined based on the following steps:
Controlling a sample sound source to play standard audio corresponding to any audio intensity at any sampling relative position, and acquiring the standard audio through a sampling microphone to obtain an actually measured microphone output signal output by the sampling microphone; the sampling relative position is the relative position of the sampling microphone and the sample sound source;
And determining an audio attenuation coefficient corresponding to the relative position of any audio intensity and any sample based on the intensity of any audio intensity and the intensity of the output signal of the actually measured microphone.
According to an embodiment of the present invention, the determining, based on the location information of the sound source to be tested, the relative positions of the sound source to be tested and the microphones specifically includes:
Determining the relative position of the sound source to be measured and each microphone based on the relative position of the sound source to be measured and a reference microphone in the sound source position information to be measured and the relative position of the reference microphone and each other microphone; the reference microphone is any one of the plurality of microphones.
According to the voice test method of one embodiment of the present invention, the sound source setting information to be tested includes voice command setting information and ambient noise setting information, and the sound source position information to be tested includes voice command position information and ambient noise position information.
According to an embodiment of the present invention, the signal processing is performed on the audio to be tested of the any microphone to obtain an analog microphone output signal of the any microphone, which specifically includes:
Performing digital-to-analog conversion on the audio to be detected of any microphone to obtain an analog signal of the audio to be detected;
and amplifying the analog signal of the audio to be detected to obtain an analog microphone output signal of any microphone.
The embodiment of the invention also provides a voice testing device, which comprises:
The microphone output signal simulation unit is used for generating a simulated microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected;
And the voice test unit is used for performing voice test based on the analog microphone output signal.
The embodiment of the invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of any one of the voice test methods when executing the program.
The embodiments of the present invention also provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the speech testing method as described in any of the above.
According to the voice test method, the voice test device, the electronic equipment and the storage medium, the analog microphone output signal is generated based on the adjustable sound source setting information to be tested and the sound source position information to be tested, and the voice test is performed based on the analog microphone output signal, so that the comprehensiveness of the voice test is improved, meanwhile, adverse effects of various factors such as the microphone installation position, the actual wiring state, the operation difference of testers, the environmental noise of a production workshop and the like are shielded, the accuracy of the voice test is improved, and the retest times are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a voice test method according to an embodiment of the present invention;
fig. 2 is a flow chart of a microphone output signal simulation method according to an embodiment of the invention;
Fig. 3 is a flowchart of a method for determining an audio attenuation coefficient according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of the relative positions of a sound source to be measured and a plurality of microphones according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a voice test method according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a voice testing apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Along with the development of the intelligent control field, the functions and performances of the voice equipment for intelligent voice control influence the effect of intelligent control and the experience of man-machine interaction. In order to ensure the normal operation of the voice equipment, a manufacturer needs to perform voice test on the voice equipment based on the voice signals collected and output by the microphone when the voice equipment is produced.
In the current voice test method, test voice is output through a tester or an external power amplification system to simulate a terminal user, so that the functions of voice recognition, sound source positioning and the like of voice equipment are systematically tested. In the whole test process, after a tester or an external power amplification system plays test audio, an external microphone of the voice equipment collects the test audio signal and outputs a corresponding analog signal, and finally analog-to-digital conversion is carried out on the analog signal, so that voice test is carried out on the analog signal. However, in the whole test link, the actual test object includes a tester/power amplifier system, a microphone, a connected wire harness and a production environment besides the voice equipment, and any one of the above objects has problems, which can lead to the test result error of the voice equipment. That is, the accuracy of the voice test is affected by many factors such as the installation position of the microphone, the actual wiring state, the station of the tester, the environmental noise of the production workshop, and the like, resulting in poor accuracy of the voice test of the voice equipment.
In this regard, the embodiment of the invention provides a voice test method. Fig. 1 is a flow chart of a voice test method according to an embodiment of the present invention, as shown in fig. 1, the method includes:
Step 110, generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected;
step 120, performing a voice test based on the analog microphone output signal.
Specifically, a test command issued by a tester is received. The test command may include setting information of the sound source to be tested and position information of the sound source to be tested. Here, the setting information of the sound source to be tested is audio setting information corresponding to the sound source to be tested, and may include a voice command text corresponding to the output audio of the sound source to be tested, audio intensity of the audio, and the like. The sound source position information to be tested is the relative position of the sound source to be tested and the external microphone of the voice equipment. In order to simulate various application scenes of the voice equipment in actual operation as far as possible during testing, a tester can adjust the setting information of the sound source to be tested and the position information of the sound source to be tested at any time, so that different setting information of the sound source to be tested can embody various voice commands and various audio intensities, different position information of the sound source to be tested can embody the relative positions of various sound sources and microphones, and the combination of the two can ensure the comprehensiveness of voice testing, thereby ensuring that the voice equipment passing the testing can normally operate when being put into actual application.
After obtaining the setting information of the sound source to be tested and the position information of the sound source to be tested, which are set by the tester, the audio can be synthesized based on the setting information of the sound source to be tested and the position information of the sound source to be tested, and when the sound source actually sounds, the transmission process of the audio and the process of the microphone collecting signals are simulated, and corresponding simulated microphone output signals are generated. Here, when the analog microphone output signal is similar to the audio played by the sound source corresponding to the same sound source setting information and sound source position information to be tested, the voice equipment is externally connected with the signal actually collected and output by the microphone.
Then, based on the analog microphone output signal, a voice test is performed on the voice device. When the voice recognition test or the sound source positioning test is carried out, as a tester can adjust the setting information of the sound source to be detected and the position information of the sound source to be detected at any time, various application scenes such as different voice commands with different audio intensities sent by a user at different positions are simulated, and the voice recognition accuracy or the sound source positioning accuracy of the voice equipment to be detected is comprehensively tested. In addition, the tester can also adjust the time interval of inputting the test command so as to improve the efficiency of the voice test and save the test time.
Because the basis of the voice test is the simulated microphone output signal obtained by simulation, a tester or an external power amplification system is not required to play test audio in the whole test process, and a microphone is not required to collect and convert signals, adverse effects of various factors such as the installation position of the microphone, the actual wiring state, the operation difference of the tester, the environmental noise of a production workshop and the like can be shielded, the accuracy of the voice test is improved, and the retest times are reduced.
According to the method provided by the embodiment of the invention, the analog microphone output signal is generated based on the adjustable sound source setting information to be tested and the sound source position information to be tested, and the voice test is performed based on the analog microphone output signal, so that the comprehensiveness of the voice test is improved, meanwhile, adverse effects of a plurality of factors such as the microphone installation position, the actual wiring state, the operation difference of testers, the environmental noise of a production workshop and the like are shielded, the accuracy of the voice test is improved, and the retest times are reduced.
Based on the foregoing embodiments, fig. 2 is a flowchart of a microphone output signal simulation method according to an embodiment of the present invention, as shown in fig. 2, step 110 specifically includes:
Step 111, determining the relative positions of the sound source to be measured and a plurality of microphones based on the position information of the sound source to be measured;
step 112, attenuating the standard audio corresponding to the sound source setting information to be tested based on the audio attenuation coefficient corresponding to the relative position of the sound source to be tested and any microphone to obtain the audio to be tested of the microphone;
step 113, performing signal processing on the audio to be tested of the microphone to obtain an analog microphone output signal of the microphone.
Specifically, the sound is gradually attenuated in the process of being transmitted from the sound source to the microphone, that is, the audio collected by the microphone is the result of attenuation of the audio played by the sound source. Therefore, in order to properly simulate the audio collected and output at the microphone, it is necessary to determine the audio attenuation coefficient at which the audio reaches the microphone position from the sound source position to be measured via air propagation. The audio attenuation coefficient refers to the attenuation degree of audio intensity when audio propagates from a sound source to be measured to a microphone, and the magnitude of the attenuation degree is influenced by the relative position between the sound source to be measured and the microphone.
When the voice equipment is externally connected with one or more microphones, each microphone can acquire the audio played by the sound source to be tested, so that corresponding analog microphone output signals are required to be generated for each microphone. However, since the relative positions of the microphones and the sound source to be measured are different, the corresponding audio attenuation coefficients are different for different microphones, and the acquired audio is also different. Therefore, the relative positions of the sound source to be tested and each microphone can be determined based on the position information of the sound source to be tested, which is given by the tester. The relative position between the sound source to be measured and any microphone may include the abscissa of the sound source to be measured in a rectangular coordinate system with the microphone as an origin, and may further include the distance between the sound source to be measured and the microphone, and the included angle between the connecting line between the sound source to be measured and the microphone and the horizontal direction or the vertical direction.
After the relative position of the sound source to be measured and each microphone is obtained, for any microphone, a corresponding audio attenuation coefficient is determined based on the relative position of the sound source to be measured and the microphone. And then, attenuating the standard audio corresponding to the sound source setting information to be detected based on the audio attenuation coefficient to obtain the audio to be detected of the microphone. The standard audio is audio corresponding to different sound source setting information acquired by the sampling microphone in advance. Specifically, the audio corresponding to the different sound source setting information may be played using the sample sound source, respectively, and then collected by the sampling microphone provided at the position of the sample sound source. Because the attenuation of the audio transmitted from the sample sound source to the sampling microphone is small and can be ignored, the acquired audio can be used as standard audio corresponding to different sound source setting information so as to simulate the audio played by the sound source to be tested. And finally, carrying out signal processing on the audio to be detected of the microphone, and converting the audio into a signal form which can be received by a microphone interface of the voice equipment to be detected, wherein the signal form is used as an analog microphone output signal of the microphone.
According to the method provided by the embodiment of the invention, the relative positions of the sound source to be detected and the microphones are determined based on the position information of the sound source to be detected, so that the standard audio corresponding to the setting information of the sound source to be detected is attenuated and subjected to signal processing based on the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone, the analog microphone output signal of the microphone is obtained, and the accuracy of the analog microphone output signal is improved.
Based on any of the above embodiments, the audio attenuation coefficient corresponding to the relative position between the sound source to be measured and any microphone is determined based on the following steps:
And selecting the audio intensity in the setting information of the sound source to be detected and the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone from the audio attenuation coefficients corresponding to different audio intensities and different relative positions which are predetermined.
Specifically, since the audio attenuation coefficient is related to the relative position between the sound source to be measured and the microphone, and also related to the audio intensity of the audio played by the sound source to be measured, the sample sound source can be deployed at different relative positions in advance, the audio with different audio intensities can be played again, and then the audio attenuation coefficient at the moment is calculated, so that the audio attenuation coefficient corresponding to the different audio intensities and the different relative positions can be obtained. Here, the audio attenuation coefficients corresponding to different audio intensities and different relative positions can be stored in the audio attenuation coefficient matrix, so that the retrieval is convenient. For example, a pick-up space of a microphone may be divided into m×n two-dimensional spaces by using the microphone as an origin, where each coordinate point in the two-dimensional space represents a relative position of a sound source to be measured and the microphone, and for any audio intensity, an audio attenuation coefficient corresponding to each coordinate point in the two-dimensional space is calculated, so as to construct an audio attenuation coefficient matrix as shown below:
Wherein epsilon [ k ] is an audio attenuation coefficient matrix when the audio intensity is k, epsilon (i, j, k), i epsilon [1, m ], j epsilon [1, n ] is an audio attenuation coefficient corresponding to a coordinate (i, j) in the two-dimensional space when the audio intensity is k.
After the relative position between the sound source to be detected and any microphone is determined, the audio frequency intensity contained in the sound source setting information to be detected is combined, the audio frequency attenuation coefficient library is searched, and the audio frequency intensity and the audio frequency attenuation coefficient corresponding to the relative position are selected.
Based on any of the above embodiments, fig. 3 is a flow chart of an audio attenuation coefficient determining method according to an embodiment of the present invention, and as shown in fig. 3, audio attenuation coefficients corresponding to different audio intensities and different relative positions are determined based on the following steps:
Step 310, controlling a sample sound source to play standard audio corresponding to any audio intensity at any sampling relative position, and collecting the standard audio through a sampling microphone to obtain an actually measured microphone output signal output by the sampling microphone; the sampling relative position is the relative position of the sampling microphone and the sample sound source.
Step 320, determining an audio attenuation coefficient corresponding to the audio intensity and the relative position of the sample based on the audio intensity and the measured microphone output signal intensity.
Specifically, a sample sound source is disposed at an arbitrary sampling relative position (i, j), and then standard audio corresponding to the audio intensities of k classes is played in turn. Here, the sampling relative position is a relative position of the sampling microphone and the sample sound source. Then, the standard audio played by the sample sound source is collected by the sampling microphone, so that the strength V (i, j, 1), V (i, j, 2), …, V (i, j, k) of the measured microphone output signal output by the sampling microphone is obtained.
The strength of the output signal of the actually measured microphone acquired and output by the sampling microphone is the product of the audio strength of the standard audio and the audio attenuation coefficient corresponding to the audio strength and the sampling relative position. Namely, the relationship between the audio intensity, the intensity of the measured microphone output signal, and the audio attenuation coefficient corresponding to the audio intensity and the relative position of the sample satisfies the following condition:
Wherein V (i, j, k) is the intensity of the output signal of the microphone actually measured when the sample sound source plays the standard audio with the audio intensity level k at the sampling relative position (i, j), U k is the audio intensity of the standard audio, and epsilon (i, j, k) is the audio attenuation coefficient corresponding to the audio intensity and the sampling relative position.
Therefore, based on the audio intensity and the intensity of the measured microphone output signal, an audio attenuation coefficient corresponding to the relative position of the audio intensity and the sample can be calculated.
Based on any of the above embodiments, step 111 specifically includes:
Determining the relative position of the sound source to be measured and each microphone based on the relative position of the sound source to be measured and the reference microphone in the sound source position information to be measured and the relative positions of the reference microphone and each other microphone; the reference microphone is any one of a plurality of microphones.
Specifically, when the voice device to be tested is externally connected with a plurality of microphones, the basic parameters of the microphones are the same, and the difference is only that the relative positions between the sound source to be tested and each microphone are different, i.e. the difference of signals collected and output by each microphone is only related to the relative positions between the sound source to be tested and each microphone, so that the relative positions between the sound source to be tested and each microphone need to be determined respectively. Typically, the relative position between the individual microphones connected to the voice device under test is fixed. Taking a vehicle-mounted voice device as an example, a microphone connected with the vehicle-mounted voice device is a dual-microphone array, wherein the dual-microphone array comprises a main driving microphone which is close to a main driving and a sub-driving microphone which is close to a sub-driving, and relative positions between the main driving microphone and the sub-driving microphone are fixed for the vehicle-mounted voice device of the same vehicle type.
Therefore, after any one of the microphones is selected as the reference microphone and the relative positions of the sound source to be measured and the reference microphone are set in the sound source position information to be measured, the relative positions of the sound source to be measured and each microphone can be determined and obtained based on the relative positions of the reference microphone and each of the other microphones. Fig. 4 is a schematic diagram of the relative positions of a sound source to be measured and a plurality of microphones, as shown in fig. 4, taking a dual microphone array corresponding to a vehicle-mounted voice device as an example, a primary driving microphone mic1 is selected as a reference microphone, the relative position between a sound source s to be measured and the primary driving microphone mic1 is (x 1,y1), and the distance between the primary driving microphone mic1 and a secondary driving microphone mic2 is L. Taking the main driving microphone mic1 as the origin of a coordinate system, if x 1 is less than 0 and L > |x 1 |, namely when the sound source to be measured is positioned at the shadow part in fig. 4, the distance between the sound source s to be measured and the auxiliary driving microphone mic2 can be calculated according to the triangle Pythagorean theorem:
meanwhile, according to the definition of the tangent function, the included angle between the connecting line between the sound source s to be measured and the secondary driving microphone mic2 and the horizontal direction can be calculated:
δ2=argtan(y1/(L-|x1|))
if x 1 is greater than or equal to 0, or |x 1 | > L and x 1 is less than 0, that is, the sound source to be measured is located at a position outside the shadow part of FIG. 4, the distance between the sound source s to be measured and the secondary driving microphone mic2 can be calculated according to the triangle Pythagorean theorem:
And then according to the definition of the tangent function, calculating the included angle between the connecting line between the sound source s to be measured and the secondary driving microphone mic2 and the horizontal direction:
δ2=argtan(y1/|L+x1|)
It should be noted that, the distance between the sound source s to be measured and the secondary driving microphone mic2 and the included angle between the connecting line between the sound source s to be measured and the secondary driving microphone mic2 and the horizontal direction may be directly used as the relative position between the sound source s to be measured and the secondary driving microphone mic2, or the distance between the sound source s to be measured and the secondary driving microphone mic2 and the included angle between the connecting line between the sound source s to be measured and the secondary driving microphone mic2 and the horizontal direction may be converted into the form of the horizontal and vertical coordinates, and used as the relative position between the sound source s to be measured and the secondary driving microphone.
Similarly, when the number of microphones is greater than 2, the relative position of each of the remaining microphones and the sound source to be measured may be calculated in the same manner.
After the relative position of the sound source to be measured and each microphone is determined, for any microphone, the audio attenuation coefficient corresponding to the audio intensity and the relative position can be determined based on the relative position of the sound source to be measured and the microphone and the audio intensity of the standard audio played by the sound source to be measured, the standard audio is attenuated based on the determined audio attenuation coefficient, and the analog microphone output signal corresponding to the microphone is obtained after signal processing.
Based on any of the above embodiments, the sound source setting information to be measured includes voice command setting information and ambient noise setting information, and the sound source position information to be measured includes voice command position information and ambient noise position information.
In particular, the use environment of the voice device is not absolutely quiet when actually put into use, and various environmental noises are doped in addition to the voice command of the user. For example, when the vehicle-mounted voice equipment is in use, noise such as engine noise, wind noise, tyre noise and the like can be contained in signals collected and output by the microphone. In order to simulate the actual application scene of the voice equipment in actual operation as far as possible during the test, so as to ensure that the voice equipment passing the test can normally operate when being put into the actual application, and environmental noise needs to be considered during the test.
Therefore, the tester needs to set the voice command setting information and the environmental noise setting information at the same time when setting the sound source setting information to be measured. The voice command setting information may include voice command text and audio intensity of voice command audio, and the environmental noise setting information may include environmental noise type such as engine noise, wind noise or tire noise, and audio intensity of noise audio. In addition, the environmental noise sound source is different from the voice command sound source, and therefore, when setting the sound source position information to be measured, it is necessary to set the voice command position information and the environmental noise position information, respectively, representing the position information of the voice command sound source and the position information of the environmental noise sound source, respectively.
Because the sound source to be tested comprises the voice command sound source and the environment noise sound source, when the corresponding analog microphone output signal is generated for any microphone, the audio to be tested corresponding to the voice command and the audio to be tested corresponding to the environment noise are required to be overlapped, and then the signal processing is carried out, so that the analog microphone output signal is obtained. The method comprises the steps of selecting corresponding standard audio based on voice command text and audio intensity in voice command setting information, and attenuating the standard audio based on audio attenuation coefficients corresponding to the audio intensity and voice command position information to obtain audio to be detected corresponding to the voice command.
For the environmental noise, it is necessary to construct in advance standard audio corresponding to different types of environmental noise and different levels of audio intensity. For any type of environmental noise, audio attenuation coefficients corresponding to different audio intensities and relative positions of different environmental noises are also required to be measured in advance, so that audio to be measured corresponding to the environmental noise is generated according to the same generation mode of the audio to be measured corresponding to the voice command. In addition, since the position of the sound source of the environmental noise is fixed with respect to a part of the environmental noise such as engine noise, only the audio attenuation coefficients corresponding to different audio intensities may be measured when determining the audio attenuation coefficients.
Taking engine noise as an example, since the distance between the engine and the microphone is fixed, the signal intensity received by the microphone is only related to the noise audio intensity emitted by the engine, and the noise audio intensity emitted by the engine is usually related to the rotation speed, so that the noise audio intensity emitted by the engine at different rotation speeds can be measured, and the measured microphone output signal intensity output by the microphone can be sampled. According to the following relations among the noise audio intensity sent by the engine, the actually measured microphone output signal intensity output by the sampling microphone and the audio attenuation coefficients corresponding to the noise audio intensity, calculating the audio attenuation coefficients corresponding to different noise audio intensities:
V[p,q,kpq]=[V(p,q,1),V(p,q,2),…,V(p,q,kpq)]
=[ε(p,q,1),ε(p,q,2),…,ε(p,q,kpq)]*Wkpq
=ε[p,q,kpq]*Wkpq
Wherein V [ p, q, k pq ] comprises measured microphone output signal intensities V (p, q, 1), V (p, q, 2) of the sampled microphone output when the engine emits noise of audio intensities from levels 1 to k pq, V (p, q, k pq);Wkpq) is the noise intensity of levels 1,2 or k pq emitted by the engine, and ε [ p, q, k pq ] comprises audio attenuation coefficients ε (p, q, 1), ε (p, q, 2), ε (p, q, pq) corresponding to the noise audio intensities of levels 1 to k pq.
According to the method provided by the embodiment of the invention, the voice command setting information and the environment noise setting information are set in the sound source setting information to be tested, and the voice command position information and the environment noise position information are set in the sound source position information to be tested, so that the actual application scene can be simulated more accurately, and the accuracy of voice test is improved.
Based on any of the above embodiments, step 113 specifically includes:
performing digital-to-analog conversion on the audio to be detected of any microphone to obtain an analog signal of the audio to be detected;
And amplifying the analog signal of the audio to be detected to obtain an analog microphone output signal of the microphone.
Specifically, in order to convert the audio into a signal form that can be received by the microphone interface of the to-be-tested voice device, considering that the signal output by the microphone to the voice device is an analog signal, the to-be-tested audio of any microphone needs to be digital-to-analog converted by using a digital-to-analog converter D/a to obtain the analog signal of the to-be-tested audio. In addition, the voltage amplitude of the microphone output signal which can be received by the voice equipment to be tested needs to be in a certain voltage range, and the voltage amplitude of the analog signal obtained after digital-to-analog conversion may be smaller, so that the voltage range cannot be reached. Therefore, the signal amplification control circuit can be used for amplifying the analog signal of the audio to be detected, so that the voltage amplitude of the obtained analog microphone output signal can meet the receiving requirement of the voice equipment to be detected. When the signal is amplified, a gain value can be determined based on the audio amplitude of the audio to be detected and the voltage amplitude of the output signal of the sampling microphone, and the analog signal of the audio to be detected is amplified based on the gain value.
Based on any of the above embodiments, fig. 5 is a schematic flow chart of a voice testing method according to another embodiment of the present invention, as shown in fig. 5, where the method includes:
Step 510, receiving a test command issued by a tester. Here, the test command includes voice command setting information, ambient noise setting information, voice command position information, and ambient noise position information. Wherein the voice command setting information further includes voice command text and audio intensity of voice command audio, and the ambient noise setting information further includes an ambient noise type and audio intensity of noise audio. The tester can also control the time interval of inputting the test command so as to improve the efficiency of the voice test and save the test time.
In step 520, based on the voice command position information and the ambient noise position information, the relative positions of the voice command sound source and the ambient noise sound source and the plurality of microphones, respectively, are determined. Specifically, the relative positions of the voice command sound source and the environmental noise sound source with each of the microphones may be determined based on the relative positions of the voice command sound source and the reference microphone, the relative positions of the environmental noise sound source and the reference microphone, and the relative positions of the reference microphone and each of the remaining microphones.
Step 530, determining an audio attenuation coefficient of the voice command audio based on the audio intensity of the voice command audio and the relative position of the voice command sound source and any microphone; an audio attenuation coefficient of the noise audio is determined based on the audio intensity of the noise audio and the relative position of the noise source and the microphone.
Step 540, the audio attenuation coefficient of the voice command audio and the audio attenuation coefficient of the noise audio are used for attenuating the voice command standard audio and the noise standard audio respectively, so as to obtain the audio to be detected corresponding to the voice command and the audio to be detected corresponding to the environmental noise. Wherein the voice command standard audio is determined according to the voice command text and the audio intensity of the voice command audio, and the noise standard audio is determined according to the type of environmental noise and the audio intensity of the noise audio. Specifically, the following formula is adopted to calculate the audio to be detected corresponding to the voice command and the audio to be detected corresponding to the environmental noise:
V[xi,yj,kij]=ε(xi,yj,kij)*U(n)
V[xp,yq,kpq]=ε(xp,yq,kpq)*W(n)
Wherein U (n) and W (n) are discrete forms of the standard voice command audio and the standard noise audio, epsilon (x i,yj,kij) is an audio attenuation coefficient of the voice command audio corresponding to the relative position (x i,yj) and the audio intensity k ij, epsilon (x p,yq,kpq) is an audio attenuation coefficient of the noise audio corresponding to the relative position (x p,yq) and the audio intensity k pq, and V [ x i,yj,kij ] and V [ x p,yq,kpq ] are the audio to be tested corresponding to the voice command and the audio to be tested corresponding to the environmental noise, respectively.
Step 550, superimposing the audio to be tested corresponding to the voice command and the audio to be tested corresponding to the environmental noise, to obtain the audio to be tested of the microphone:
Z1(n)=V[xi,yj,kij]+V[xp,yq,kpq]
Step 560, digital-to-analog conversion and signal amplification are performed on the audio to be tested of the microphone, so as to obtain an analog microphone output signal of the microphone.
In step 570, the analog microphone output signal of each microphone is transmitted to the voice device under test for voice testing. Specifically, the channel control method may be used to open the input channels of the voice device to be tested corresponding to the microphones, and input the analog microphone output signal of each microphone to the voice device to be tested.
The voice test device provided by the embodiment of the invention is described below, and the voice test device described below and the voice test method described above can be referred to correspondingly.
Based on any of the above embodiments, fig. 6 is a schematic structural diagram of a voice testing apparatus according to an embodiment of the present invention, as shown in fig. 6, where the apparatus includes: a microphone output signal simulation unit 610 and a voice test unit 620.
The microphone output signal simulation unit 610 is configured to generate a simulated microphone output signal based on the sound source setting information to be measured and the sound source position information to be measured;
the voice test unit 620 is used for performing voice test based on the analog microphone output signal.
According to the device provided by the embodiment of the invention, the analog microphone output signal is generated based on the adjustable sound source setting information to be tested and the sound source position information to be tested, and the voice test is performed based on the analog microphone output signal, so that the comprehensiveness of the voice test is improved, meanwhile, adverse effects of a plurality of factors such as the microphone installation position, the actual wiring state, the operation difference of testers, the environmental noise of a production workshop and the like are shielded, the accuracy of the voice test is improved, and the retest times are reduced.
Based on any of the above embodiments, the microphone output signal simulation unit 610 specifically includes:
The relative position determining unit is used for determining the relative positions of the sound source to be detected and the microphones based on the position information of the sound source to be detected;
The to-be-detected audio generating unit is used for attenuating standard audio corresponding to the to-be-detected sound source setting information based on an audio attenuation coefficient corresponding to the relative position of the to-be-detected sound source and any microphone to obtain to-be-detected audio of the microphone;
And the signal processing unit is used for performing signal processing on the audio to be detected of the microphone to obtain an analog microphone output signal of the microphone.
According to the device provided by the embodiment of the invention, the relative positions of the sound source to be detected and the microphones are determined based on the position information of the sound source to be detected, so that the standard audio corresponding to the setting information of the sound source to be detected is attenuated and subjected to signal processing based on the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone, the analog microphone output signal of the microphone is obtained, and the accuracy of the analog microphone output signal is improved.
Based on any of the above embodiments, the apparatus further includes an audio attenuation coefficient determining unit, where the audio attenuation coefficient determining unit is specifically configured to:
And selecting the audio intensity in the setting information of the sound source to be detected and the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone from the audio attenuation coefficients corresponding to different audio intensities and different relative positions which are predetermined.
Based on any of the above embodiments, the apparatus further includes an audio attenuation coefficient measurement unit, where the audio attenuation coefficient measurement unit is specifically configured to:
Controlling a sample sound source to play standard audio corresponding to any audio intensity at any sampling relative position, and collecting the standard audio through a sampling microphone to obtain an actually measured microphone output signal output by the sampling microphone; the sampling relative position is the relative position of the sampling microphone and the sample sound source.
Based on the audio intensity, and the measured intensity of the microphone output signal, an audio attenuation coefficient corresponding to the relative position of the audio intensity and the sample is determined.
Based on any of the above embodiments, the relative position determining unit is specifically configured to:
Determining the relative position of the sound source to be measured and each microphone based on the relative position of the sound source to be measured and the reference microphone in the sound source position information to be measured and the relative positions of the reference microphone and each other microphone; the reference microphone is any one of a plurality of microphones.
Based on any of the above embodiments, the sound source setting information to be measured includes voice command setting information and ambient noise setting information, and the sound source position information to be measured includes voice command position information and ambient noise position information.
According to the device provided by the embodiment of the invention, the voice command setting information and the environment noise setting information are set in the sound source setting information to be tested, and the voice command position information and the environment noise position information are set in the sound source position information to be tested, so that the actual application scene can be simulated more accurately, and the accuracy of voice test is improved.
Based on any of the above embodiments, the signal processing unit is specifically configured to:
performing digital-to-analog conversion on the audio to be detected of any microphone to obtain an analog signal of the audio to be detected;
And amplifying the analog signal of the audio to be detected to obtain an analog microphone output signal of the microphone.
Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a voice test method comprising: generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected; and performing voice test based on the analog microphone output signal.
Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, embodiments of the present invention also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the voice test method provided by the above-described method embodiments, the method comprising: generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected; and performing voice test based on the analog microphone output signal.
In yet another aspect, embodiments of the present invention further provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the voice test method provided in the above embodiments, the method comprising: generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected; and performing voice test based on the analog microphone output signal.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A method of voice testing, comprising:
generating an analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected;
performing a voice test based on the analog microphone output signal;
the sound source setting information to be measured represents audio setting information corresponding to the sound source to be measured, and the audio setting information comprises: the method comprises the steps that a sound source to be tested outputs a voice command text corresponding to audio and the sound source to be tested outputs audio intensity corresponding to the audio;
the generating the analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected specifically comprises:
determining the relative positions of the sound source to be detected and a plurality of microphones based on the position information of the sound source to be detected;
Attenuating standard audio corresponding to the setting information of the sound source to be detected based on an audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone to obtain the audio to be detected of any microphone;
Performing signal processing on the audio to be detected of any microphone to obtain an analog microphone output signal of any microphone;
The audio attenuation coefficient corresponding to the relative position of the sound source to be measured and any microphone is determined based on the following steps:
based on any audio intensity, calculating an audio attenuation coefficient corresponding to each coordinate point in a two-dimensional space, constructing an audio attenuation coefficient matrix, and selecting the audio intensity in the setting information of the sound source to be detected and the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone from the audio attenuation coefficient matrix; each coordinate point in the two-dimensional space represents the relative position of the sound source to be measured and any microphone.
2. The method of claim 1, wherein the audio attenuation coefficients corresponding to different audio intensities and different relative positions are determined based on the steps of:
Controlling a sample sound source to play standard audio corresponding to any audio intensity at any sampling relative position, and acquiring the standard audio through a sampling microphone to obtain an actually measured microphone output signal output by the sampling microphone; the sampling relative position is the relative position of the sampling microphone and the sample sound source;
And determining an audio attenuation coefficient corresponding to the relative position of any audio intensity and any sample based on the intensity of any audio intensity and the intensity of the output signal of the actually measured microphone.
3. The method for testing voice according to claim 1, wherein determining the relative positions of the sound source to be tested and the plurality of microphones based on the position information of the sound source to be tested specifically comprises:
Determining the relative position of the sound source to be measured and each microphone based on the relative position of the sound source to be measured and a reference microphone in the sound source position information to be measured and the relative position of the reference microphone and each other microphone; the reference microphone is any one of the plurality of microphones.
4. A voice test method according to any one of claims 1 to 3, wherein the sound source setting information to be tested includes voice command setting information and environmental noise setting information, and the sound source position information to be tested includes voice command position information and environmental noise position information.
5. A method for testing voice according to any one of claims 1 to 3, wherein the signal processing is performed on the audio to be tested of the any one microphone to obtain an analog microphone output signal of the any one microphone, specifically including:
Performing digital-to-analog conversion on the audio to be detected of any microphone to obtain an analog signal of the audio to be detected;
and amplifying the analog signal of the audio to be detected to obtain an analog microphone output signal of any microphone.
6. A voice testing apparatus, comprising:
The microphone output signal simulation unit is used for generating a simulated microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected;
the voice test unit is used for performing voice test based on the analog microphone output signal;
the sound source setting information to be measured represents audio setting information corresponding to the sound source to be measured, and the audio setting information comprises: the method comprises the steps that a sound source to be tested outputs a voice command text corresponding to audio and the sound source to be tested outputs audio intensity corresponding to the audio;
the generating the analog microphone output signal based on the sound source setting information to be detected and the sound source position information to be detected specifically comprises:
determining the relative positions of the sound source to be detected and a plurality of microphones based on the position information of the sound source to be detected;
Attenuating standard audio corresponding to the setting information of the sound source to be detected based on an audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone to obtain the audio to be detected of any microphone;
Performing signal processing on the audio to be detected of any microphone to obtain an analog microphone output signal of any microphone;
The audio attenuation coefficient corresponding to the relative position of the sound source to be measured and any microphone is determined based on the following steps:
based on any audio intensity, calculating an audio attenuation coefficient corresponding to each coordinate point in a two-dimensional space, constructing an audio attenuation coefficient matrix, and selecting the audio intensity in the setting information of the sound source to be detected and the audio attenuation coefficient corresponding to the relative position of the sound source to be detected and any microphone from the audio attenuation coefficient matrix; each coordinate point in the two-dimensional space represents the relative position of the sound source to be measured and any microphone.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the speech testing method according to any one of claims 1 to 5 when the program is executed by the processor.
8. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the speech testing method according to any one of claims 1 to 5.
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